20489220

素因数分解:

$2^2\times 3^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{1997}}^1$

素因数の和:2034

約数の個数: 96

約数和(自身を含む): 67132800

約数和(自身を除く): 46643580

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 19, 20, 27, 30, 36, 38, 45, 54, 57, 60, 76, 90, 95, 108, 114, 135, 171, 180, 190, 228, 270, 285, 342, 380, 513, 540, 570, 684, 855, 1026, 1140, 1710, 1997, 2052, 2565, 3420, 3994, 5130, 5991, 7988, 9985, 10260, 11982, 17973, 19970, 23964, 29955, 35946, 37943, 39940, 53919, 59910, 71892, 75886, 89865, 107838, 113829, 119820, 151772, 179730, 189715, 215676, 227658, 269595, 341487, 359460, 379430, 455316, 539190, 569145, 682974, 758860, 1024461, 1078380, 1138290, 1365948, 1707435, 2048922, 2276580, 3414870, 4097844, 5122305, 6829740, 10244610, 20489220]

約数ペア:

[(1, 20489220), (2, 10244610), (3, 6829740), (4, 5122305), (5, 4097844), (6, 3414870), (9, 2276580), (10, 2048922), (12, 1707435), (15, 1365948), (18, 1138290), (19, 1078380), (20, 1024461), (27, 758860), (30, 682974), (36, 569145), (38, 539190), (45, 455316), (54, 379430), (57, 359460), (60, 341487), (76, 269595), (90, 227658), (95, 215676), (108, 189715), (114, 179730), (135, 151772), (171, 119820), (180, 113829), (190, 107838), (228, 89865), (270, 75886), (285, 71892), (342, 59910), (380, 53919), (513, 39940), (540, 37943), (570, 35946), (684, 29955), (855, 23964), (1026, 19970), (1140, 17973), (1710, 11982), (1997, 10260), (2052, 9985), (2565, 7988), (3420, 5991), (3994, 5130)]